Mechanical seal faces sticky problem.
Mechanical seal faces sticky problem.
(OP)
Dear Engineers:
Nowadays our clients'mechanical seal faces is sticky togethe. It can not work.
The type is similar with BT-Burgmann seal type.And the size is 45mm. The fluid is hot clean water, tem' is less than 100 centigrade degree.
Both of the faces are SSiC and polished within 1 lightband.
We think the problem is so smoothy face and heavy pressure.
Any new advice on this problem?
Nowadays our clients'mechanical seal faces is sticky togethe. It can not work.
The type is similar with BT-Burgmann seal type.And the size is 45mm. The fluid is hot clean water, tem' is less than 100 centigrade degree.
Both of the faces are SSiC and polished within 1 lightband.
We think the problem is so smoothy face and heavy pressure.
Any new advice on this problem?





RE: Mechanical seal faces sticky problem.
Without knowing more about the problem, at least the rotating face should be matted in general when running hard faces together. There may be a specific procedure internal to Burgmann that calls for polishing both (it may be material specific). You should be able to run a good metal filled carbon vs. TC in this application for the most part.
RE: Mechanical seal faces sticky problem.
RE: Mechanical seal faces sticky problem.
Inserted carbon vs.T.C is not acceptable, because this mechanical seal is just to replace Packing before. The working height is very short, less than 18mm in fact.
Also we checked to use Carbon vs. SiC as trial in two seals. But we are not satisfied with the WORKING LIFE of this change. Carbon face was worn so soon and broken so easily to leak.The fluid, yes, there were some very small grains.
How about H10 from Burgmann?
Any new advice?
Best regards,
Paul paultsu@gmail.com
RE: Mechanical seal faces sticky problem.
RE: Mechanical seal faces sticky problem.
"The bottom line is you will need to ensure you have enough of a vapor pressure margin inside the seal cavity to keep the water from flashing. At 100 deg C, you need at least 1.03 barg or more inside the seal cavity for vapor suppression. The 'stickiness' you describe tells me you just don't have an adequate fluid film at the seal interface. Water has excellent thermal conductivity characteristics, relatively speaking, but it is generally a poor lubricant for seal faces so you need to carefully review the entire application specifics."
RE: Mechanical seal faces sticky problem.